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- PDB-8sr2: particulate methane monooxygenase incubated with 4,4,4-trifluorob... -

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Basic information

Entry
Database: PDB / ID: 8sr2
Titleparticulate methane monooxygenase incubated with 4,4,4-trifluorobutanol
Components
  • (Particulate methane monooxygenase ...) x 2
  • Ammonia monooxygenase/methane monooxygenase, subunit C family protein
KeywordsOXIDOREDUCTASE / metalloenzyme / membrane protein / nanodiscs
Function / homology
Function and homology information


methane monooxygenase (particulate) / methane monooxygenase (soluble) / methane monooxygenase [NAD(P)H] activity / monooxygenase activity / metal ion binding / membrane
Similarity search - Function
Ammonia monooxygenase/particulate methane monooxygenase, subunit A / Ammonia monooxygenase/particulate methane monooxygenase, subunit C / Ammonia/methane monooxygenase, subunit B, hairpin domain superfamily / Ammonia/methane monooxygenase, subunit B, C-terminal / Ammonia monooxygenase/particulate methane monooxygenase, subunit C domain superfamily / Ammonia/particulate methane monooxygenase, subunit A superfamily / Ammonia monooxygenase / Ammonia monooxygenase/methane monooxygenase, subunit C / Ammonia monooxygenase/particulate methane monooxygenase, subunit B / Ammonia/methane monooxygenase, subunitB, N-terminal / Monooxygenase subunit B protein
Similarity search - Domain/homology
COPPER (II) ION / DECANE / 1,2-dihexanoyl-sn-glycero-3-phosphocholine / 1,2-DIDECANOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / DIUNDECYL PHOSPHATIDYL CHOLINE / Particulate methane monooxygenase alpha subunit / Ammonia monooxygenase/methane monooxygenase, subunit C family protein / Particulate methane monooxygenase beta subunit
Similarity search - Component
Biological speciesMethylococcus capsulatus str. Bath (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.36 Å
AuthorsTucci, F.J. / Rosenzweig, A.C.
Funding support United States, 6items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM118035 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01GM111097 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)T32GM105538 United States
National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS)F31ES034283 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)T32GM008382 United States
National Science Foundation (NSF, United States)MCB-1908587 United States
CitationJournal: Nat Catal / Year: 2023
Title: Product analog binding identifies the copper active site of particulate methane monooxygenase.
Authors: Frank J Tucci / Richard J Jodts / Brian M Hoffman / Amy C Rosenzweig /
Abstract: Nature's primary methane-oxidizing enzyme, the membrane-bound particulate methane monooxygenase (pMMO), catalyzes the oxidation of methane to methanol. pMMO activity requires copper, and decades of ...Nature's primary methane-oxidizing enzyme, the membrane-bound particulate methane monooxygenase (pMMO), catalyzes the oxidation of methane to methanol. pMMO activity requires copper, and decades of structural and spectroscopic studies have sought to identify the active site among three candidates: the Cu, Cu, and Cu sites. Challenges associated with the isolation of active pMMO have hindered progress toward locating its catalytic center. However, reconstituting pMMO into native lipid nanodiscs stabilizes its structure and recovers its activity. Here, these active samples were incubated with 2,2,2,-trifluoroethanol (TFE), a product analog that serves as a readily visualized active-site probe. Interactions of TFE with the Cu site were observed by both pulsed ENDOR spectroscopy and cryoEM, implicating Cu and the surrounding hydrophobic pocket as the likely site of methane oxidation. Use of these orthogonal techniques on parallel samples is a powerful approach that can circumvent difficulties in interpreting metalloenzyme cryoEM maps.
History
DepositionMay 5, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 15, 2023Provider: repository / Type: Initial release
Revision 1.0Nov 15, 2023Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Nov 15, 2023Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
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Revision 1.0Nov 15, 2023Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Nov 15, 2023Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Nov 15, 2023Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Nov 15, 2023Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Nov 15, 2023Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 2.0Jul 3, 2024Group: Advisory / Atomic model ...Advisory / Atomic model / Author supporting evidence / Data collection / Derived calculations / Source and taxonomy / Structure summary
Category: atom_site / atom_site_anisotrop ...atom_site / atom_site_anisotrop / database_PDB_caveat / em_admin / entity / entity_src_nat / pdbx_entity_instance_feature / pdbx_entry_details / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_struct_conn_angle / pdbx_validate_close_contact / pdbx_validate_polymer_linkage / pdbx_validate_torsion / struct_asym / struct_conf / struct_conn
Item: _atom_site_anisotrop.id / _em_admin.last_update ..._atom_site_anisotrop.id / _em_admin.last_update / _entity.pdbx_number_of_molecules / _entity_src_nat.pdbx_organism_scientific / _pdbx_entry_details.has_ligand_of_interest / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_validate_close_contact.auth_asym_id_1 / _pdbx_validate_close_contact.auth_asym_id_2 / _pdbx_validate_close_contact.auth_atom_id_1 / _pdbx_validate_close_contact.auth_atom_id_2 / _pdbx_validate_close_contact.auth_seq_id_1 / _pdbx_validate_close_contact.auth_seq_id_2 / _pdbx_validate_close_contact.dist / _pdbx_validate_torsion.phi / _pdbx_validate_torsion.psi
Description: Sequence discrepancy / Provider: author / Type: Coordinate replacement
Revision 2.1Mar 5, 2025Group: Data collection / Database references / Structure summary
Category: citation / citation_author ...citation / citation_author / em_admin / pdbx_entry_details
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _em_admin.last_update / _pdbx_entry_details.has_protein_modification
Revision 1.1Mar 5, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Database references / Experimental summary / Data content type: EM metadata / EM metadata / EM metadata / Category: citation / citation_author / em_admin
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Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Particulate methane monooxygenase alpha subunit
B: Particulate methane monooxygenase beta subunit
C: Ammonia monooxygenase/methane monooxygenase, subunit C family protein
E: Particulate methane monooxygenase alpha subunit
I: Particulate methane monooxygenase alpha subunit
J: Particulate methane monooxygenase beta subunit
F: Particulate methane monooxygenase beta subunit
G: Ammonia monooxygenase/methane monooxygenase, subunit C family protein
K: Ammonia monooxygenase/methane monooxygenase, subunit C family protein
hetero molecules


Theoretical massNumber of molelcules
Total (without water)337,22175
Polymers313,2429
Non-polymers23,97866
Water7,224401
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Particulate methane monooxygenase ... , 2 types, 6 molecules AEIBJF

#1: Protein Particulate methane monooxygenase alpha subunit / Methane monooxygenase B subunit / Particulate methane monooxygenase 45 kDa subunit / Particulate ...Methane monooxygenase B subunit / Particulate methane monooxygenase 45 kDa subunit / Particulate methane monooxygenase 47 kDa subunit / Particulate methane monooxygenase hydroxylase 45 kDa subunit / Particulate methane monooxygenase hydroxylase alpha subunit / pMMO-H alpha subunit


Mass: 46129.746 Da / Num. of mol.: 3 / Source method: isolated from a natural source
Source: (natural) Methylococcus capsulatus str. Bath (bacteria)
Strain: Bath
References: UniProt: G1UBD1, methane monooxygenase (particulate)
#2: Protein Particulate methane monooxygenase beta subunit / Methane monooxygenase A subunit / Particulate methane monooxygenase 27 kDa subunit / Particulate ...Methane monooxygenase A subunit / Particulate methane monooxygenase 27 kDa subunit / Particulate methane monooxygenase hydroxylase 26 kDa subunit / Particulate methane monooxygenase hydroxylase beta subunit / pMMO-H beta subunit


Mass: 28445.098 Da / Num. of mol.: 3 / Source method: isolated from a natural source
Source: (natural) Methylococcus capsulatus str. Bath (bacteria)
Strain: Bath
References: UniProt: Q607G3, methane monooxygenase (particulate)

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Protein , 1 types, 3 molecules CGK

#3: Protein Ammonia monooxygenase/methane monooxygenase, subunit C family protein / Methane monooxygenase / C subunit


Mass: 29839.309 Da / Num. of mol.: 3 / Source method: isolated from a natural source
Source: (natural) Methylococcus capsulatus str. Bath (bacteria)
Strain: Bath
References: UniProt: Q603F1, methane monooxygenase (soluble)

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Non-polymers , 7 types, 467 molecules

#4: Chemical
ChemComp-CU / COPPER (II) ION


Mass: 63.546 Da / Num. of mol.: 9 / Source method: obtained synthetically / Formula: Cu / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical
ChemComp-D10 / DECANE


Mass: 142.282 Da / Num. of mol.: 18 / Source method: obtained synthetically / Formula: C10H22
#6: Chemical
ChemComp-PLC / DIUNDECYL PHOSPHATIDYL CHOLINE


Mass: 622.834 Da / Num. of mol.: 18 / Source method: obtained synthetically / Formula: C32H65NO8P / Comment: phospholipid*YM
#7: Chemical
ChemComp-P1O / 1,2-DIDECANOYL-SN-GLYCERO-3-PHOSPHOCHOLINE


Mass: 566.728 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: C28H57NO8P / Comment: DDPC, phospholipid*YM
#8: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Cl
#9: Chemical
ChemComp-HXG / 1,2-dihexanoyl-sn-glycero-3-phosphocholine / (4R,7R)-7-(hexanoyloxy)-4-hydroxy-N,N,N-trimethyl-10-oxo-3,5,9-trioxa-4-phosphapentadecan-1-aminium 4-oxide


Mass: 454.515 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C20H41NO8P
#10: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 401 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: particulate methane monooxygenase / Type: COMPLEX / Entity ID: #1, #3 / Source: NATURAL
Molecular weightValue: 337.11 kDa/nm / Experimental value: NO
Source (natural)Organism: Methylococcus capsulatus str. Bath (bacteria)
Buffer solutionpH: 7.3
SpecimenConc.: 5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: OTHER / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: OTHER / Nominal defocus max: 2500 nm / Nominal defocus min: 700 nm
Image recordingElectron dose: 52.57 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.36 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 615783 / Symmetry type: POINT

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